Tensegrity offshore wind power generation support structure

Abstract

A tensegrity offshore wind power generation support structure is provided, relating to the technical field of offshore wind power. The support structure includes inclined columns, prestressed cables, a rigid support, a floating foundation and anchoring systems. A stable self-balancing space supporting structure is formed by the inclined columns and the cables; the inclined columns inclines outwards, upper parts of the inclined columns are connected with the prestressed cables; the bottom ends of the inclined columns are connected with the floating foundation; the middle parts of the inclined columns are connected with the rigid support; and the floating foundation is fixed with a seabed through the anchoring systems. According to the support structure, a tower in the traditional design is not needed, and all the cables are ensured to be in a tension state through the support of the inclined columns.

What is claimed is: 
     
       1. A tensegrity offshore wind power generation support structure, comprising:
 anchoring systems, 
 a floating foundation; and 
 a supporting mechanism installed on the floating foundation, 
 wherein the floating foundation is fixed with a seabed through the anchoring systems; the supporting mechanism comprises a plurality of inclined columns fixedly installed at a top of the floating foundation, a top of each of the inclined columns is provided with two inclined cables, and bottom ends of the two inclined cables are respectively fixedly connected with the floating foundation at bottom ends of two adjacent inclined columns; 
 a horizontal cable is fixedly installed between the two adjacent inclined columns, both the horizontal cable and the inclined cables are arranged at a same joint of the inclined columns, and prestress is applied to both the horizontal cable and the inclined cables, and the horizontal cable, the inclined cables and the inclined columns jointly form a spatial cable-inclined column support system; a rigid support is arranged among the plurality of inclined columns, the plurality of inclined columns are all fixedly connected with the rigid support, and the rigid support is arranged at middle or lower parts of the inclined columns through connecting elements; 
 the floating foundation is a triangular prism structure, a number of the inclined columns is three, and three inclined columns are respectively arranged at three corners of a top end of the floating foundation, and the rigid support is a rigid triangular support; 
 the inclined columns are obliquely arranged towards opposite sides of a top surface of the floating foundation, and the three inclined columns are symmetrically distributed in space; Cantilevered support platforms are fixedly installed at top ends of two of the inclined columns through connecting elements, providing support for the nacelle of the wind turbine in a cantilevered manner, and the two wind turbine generator systems have same orientations; 
 a relative rotation angle θ between a triangle formed by upper end points of the inclined columns and a triangle formed by bottom end points of the inclined columns, after projecting the two triangles onto the horizontal plane, which is 55°-65°, and 
 wherein the floating foundation comprises three pontoons, the three pontoons are arranged in a triangle, and two adjacent pontoons are fixed by connecting beams; the two inclined cables fixedly installed on a same pontoon are arranged in an isosceles triangle, and connection points between the inclined cables and tops of the inclined columns are located at a same height. 
 
     
     
       2. The tensegrity offshore wind power generation support structure according to  claim 1 , wherein surfaces of the horizontal cable and the inclined cables are all subjected to anti-corrosion treatment. 
     
     
       3. The tensegrity offshore wind power generation support structure according to  claim 1 , wherein bottoms of the inclined columns are fixedly connected with the floating foundation, and the middle or lower parts of the inclined columns are connected with the rigid support through bolts or welding, and the rigid support is made of one of round steel pipe, section steel or truss. 
     
     
       4. The tensegrity offshore wind power generation support structure according to  claim 1 , wherein when one blade of the wind turbine is positioned perpendicular to the sea level, a distance from a sea level to the blade tip is not less than 25 meters; a gap between the blade tip of one wind turbine and that of another wind turbine is not less than a diameter length of each of the blades of the wind turbine power generator systems.